213031131 has 8 divisors (see below), whose sum is σ = 300749904. Its totient is φ = 133666560.

The previous prime is 213031069. The next prime is 213031153. The reversal of 213031131 is 131130312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 213031131 - 2⁷ = 213031003 is a prime.

It is a super-2 number, since 2×213031131² = 90764525550278322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 213031131.

It is not an unprimeable number, because it can be changed into a prime (213031171) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2088490 + ... + 2088591.

It is an arithmetic number, because the mean of its divisors is an integer number (37593738).

Almost surely, 2^213031131 is an apocalyptic number.

213031131 is a deficient number, since it is larger than the sum of its proper divisors (87718773).

213031131 is a wasteful number, since it uses less digits than its factorization.

213031131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4177101.

The product of its (nonzero) digits is 54, while the sum is 15.

The square root of 213031131 is about 14595.5860108459. The cubic root of 213031131 is about 597.2383555912.

Adding to 213031131 its reverse (131130312), we get a palindrome (344161443).

The spelling of 213031131 in words is "two hundred thirteen million, thirty-one thousand, one hundred thirty-one".